Thermostatic valve



FIG. 1 is a perspective view of a thermostatic valve showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view.

The portions shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

CLAIM I claim the ornamental design for a thermostatic valve, as shown and described. 